.middle > div {
    width: 900px;
    margin: 50px 0;
    border: 1px solid gray;
}

.middle > div > div:nth-child(2) > div:nth-child(1) {
    margin: 50px 0 40px 0;
}

.temp-one {
    color: rgb(230, 145, 55);
    font-size: 30px;
}

.temp-two {
    color: gray;
    font-size: 15px;

}

.temp-three {
    text-align: center;
}
#container {
    overflow: hidden;
    width: 100%;
    height: 500px;
    margin: 0;
    font-family: "微软雅黑";
}